Bending machine



J. B. MILAN BEND ING MACHINE Filed May 11, 1943 March 20, 1945.

Patented Mar. 20, 1945 2,371,838 BENDING moms. I Julius B. Milan, Galveston,-Tex. Application May 1943 Serial N6. 486,590

2 Claims.

This invention relates to a bending machine and has particular relation to a machine for} bending pipe, structural steel beams and angles and the like. j v

An object of theinvention is to provide a ma chine of the character describedfspecially def;

signed for bending pipe, rods, structural steel beams and angles and which may be readily adjusted to bend the work to any desired degree of curvature. y

It is another object to provide a machine of the character described which is 'soconStructe d as to preserve the original. cross sectional contour of the work while it is'being bent;

A further object is to provide a machine of the character described wherein the work is read? ily accessible'during 'the bending'operation so that measurements of the work can be easily taken while the bending operation is being car ried on. 1 With the above and other objects in view the bearings l8, l8 of said cross heads are the yertical shafts l9, I9 on which the rollers Ga are splined. These shafts are mounted to turn on the anti-friction bearings l1, I! as shown in Figure 2. Fixed on the shafts I 9, within the cross headsQare the screw gears Ill which are driven by corresponding screw gears ll splined on the shaft 8. This shaft is mounted to rotate in the bearings 9 in'the end plates 2 and is retainedin invention has particular relation to certain novel features of construction, operation and arrange} ment of parts, an example of which is givenin this specification and illustrated by the accord panying drawing wherein: "I

Figure 1 shows a plan view of the machine and Figure 2 shows a cross-sectional view thereof taken on the line 2-2 of Figure 1.

Referring now more particularly to the draw ing wherein like numerals of reference designate the same parts in each of the figures, a main frame is provided having the side plates or members l6, [6 whose ends are secured to the respective end plates 2, 2.

Secured on the inside of the side plates l6, l6 are the opposed longitudinal tracks 3, 3 on which the respective cross heads are mounted to slide, each cross head comprising the upper and lower plates 1, l which are connected to the respective outer plates 5. These cross'heads form also gear housings as is illustrated in Figure 2. The cross heads may be adjusted toward and from each place by the collar I z pinned on one end thereof. The shaft 8 is, preferably, power driven from the other end.

Splined on the upper ends of the shafts I! are the rollers 6a, 6a which are retained thereon by the capscrews M. There is a. lateral frame which extends across the main frame midway betweenlthe mainframe cross heads as shown inFigure 1 and which is firmly secured to said. main frame. This lateral frame is composed of the said members 16a, ltd, connected. at their outer and inner ends by the end plates 2a, 2a. Secured on the inner sides of, side members 16a, Ilia are the longitudinal 'track's 3a. 3a. Mounted to move on these tracksis the cross head comprising the upper and lower plates la, la and the end plate 51; whose ends are notched to receive the tracks 3a. An outwardly threaded shaft 4a is threaded through the outer end plate 2a and has a swivelling connection with the plate 5a of the cross head and is held against detachment therefrom by a collar [3a pinned onto the inner end of the said screw shaft 4a. This shaft may be turned by a crank and the corresponding cross head thus adjusted. Securely anchored to the crosshead la, la and upstanding therefrom there is a spindle similar to spindle I 9 and on which there is mounted to rotate the die roller l5a. This roller is retained on the spindle by the cap screw 14.

other by means of the adjusting screws 4; 4 1

be applied, through the shaft 4a, to the die roller lie so as to bend the work and the shaft 8 may be slowly rotated to rotate the rollers 6a to move the work along as it is bent. The teeth or threads of the gears I 0, II are so pitched that the rollers 6a will turn in the same direction. It is obvious that the work will'be accessible for the application of a template thereto for measuring the curvature of the work. The work may be moved back and forth and the required mounted on the movable arms '25, .25 whose inner' ends are pivoted on the respective shafts l9, IS. The idler rollers 24 are mounted to rotate I on the spindles 2B which in turn, have their lower ends fixed to the bases 30, 30 and'these bases are secured to the respective the set screws 3 I.

They are adjustable toward-and-from the ro'llw ers 6a depending on the thickness of the angle being bent. The rollers 24 have the bushings 2'9 v thereinaround the spindleszfl. r The rollers 6a, |5a,.and'24' are maintained against. detachment from their respective shafts or spindles bycap screws Mp1 I djacent the .framework there is atable 34 for. the convenience of the workman carrying on the work. .This'table has a transverse-slot'fl. .The outer ends of the arms 25 have thelongitudinal' slots.35, 35. Extended through the respective slots .35 and through the slot, 21 are therods 32 whose upper ends are threadedandpinned on the lower endsof these rods are the 'clampcollars 3.3. Threaded onto the upper ends of the -rod's32 are the outwardly knurled thumb screws 26 by' means of which the arm 25 may be maintained at any point of adjustment.

, These arms will be adjusted so that. the pres sure ro1lers 24 will be in a radial position relative in their original right angular relation: and prevent the distortion as a-result of the bending operation.

arms '25 by k "idler die roller on the last mentioned cross head,

;- means for actuating said'die roller to apply pres- The drawing and description are illustrative merely while the broad principle of the invention will be defined by the appended claims.

What I claim is:

, 1. A machine for bending elongated objects formed of bendable material, comprising a framework, a pair of oppositely arranged cross heads thereon, means for adjusting said cross heads toward and from each other, a shaft mounted on each cross ;.h 'aaj.d,{ a work receiving roller fastened on" each'shaft with its axis perpendicular to the plane of movement of the cross head, power means for rotating said shafts and rollers, a cross lrea ziv on; the frame work movable in a direction perpendicular to the work on said rollers, an

sure to the Work receiving rollers, idler pressure rollers on-the framework arranged to bear against thework opposite the workreceiving rollers and nieans ftoI.adj'ust. the idler pressure rollers to. maintain. themlfm' radial position relative to the are of curvature of the work. I

,2.. A bending machine comprising a main frame having side members and end members secured togetherginside. longitudinal tracks on the side members, cross heads mounted to slide on said tracks andspaced apart,adj usting screws threaded through said end members and having swivelling connections with the ;cross heads, rollers on the cross heads,,gearing housed within the cross ing,. a lateralfram which extends across the mainframe between the cross heads and which is secured. to the main frame, said-lateral frame comprisingside members and outer and inner end members, insideJWsitudinal tracks on the side members of the lateral frame, a cross head mounted to move on said tracks, an idler roller mounted onsaid last mentioned cross head, a

' shaftthreaded-through the outer end member of the lateral frame and having a swivelling connection with thecorresponding cross-head.

JULIUS B. -MILAN. 

